The build went through well and i was able to run it well using ./mach run. But if i double click on the Nightly.app, it open firefox with a crash tab and asks to restore. but even restoring does not solve the problem. On the terminal I got this error "[Child 58166] ###!!! ABORT: LoadSheetSync failed with error 80520015 loading built-in stylesheet 'resource://gre-resources/counterstyles.css': file /src/mozilla-central/layout/style/nsLayoutStylesheetCache.cpp, line 776 "